SR300 Surface Roughness Tester

SR300 - SR400 Surface Roughness Testers
Surface Roughness Tester

The Starrett SR300 Surface Roughness Tester is a full-featured, powerful and versatile surface roughness tester. It can be used either freestanding or bench mounted with fixturing for batch measurement and laboratory applications. Display & Traverse unit; Pick-up & Diamond Stylus; Calibration Std; Manual; and Case. 17.5mm travel, 200um range, 10nm resolution, Standard Parameter Set (ISO 4287, ASME, JIS)

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  • Large screen display
  • Unique stylus lift mechanism for total flexibility
  • Many application specific parameter options
  • Comprehensive selection optional accessories and pickups
  • Long traverse length and extended pickup reach
  • Stores of up to 100 readings


  • Accuracy (in): 2% of reading + LSD µm
  • Cutoff Lengths: 0.01, 0.03, 0.3" / 0.25, 0.8, 2.5, 8mm
  • Filter: 2CR or gaussian (selectable)
  • Measuring Range: 200/100/10µm
  • Pick-up Stylus: Inductive
  • Roughness Parameter: Ra, Rz, Rt, Rp, Rmr, Rpc, Rsm, Rz1max, Rsk, Rda
  • Tracer Tip: Diamond stylus Tip radius 200µ" / 5µm unless otherwise specified
  • Tracing Length: 0.01-0.49" / 0.25-12.5mm
  • Tracing Speed: 0.04"/sec, 1mm/sec


    SR300 and SR400 Surface Roughness Tester User Manual (Form 980)

    Ordering instructions insert for replacement rods for SR300 and SR400 surface roughness testers

    Surface Roughness Tester Brochure (Bulletin 2104)

    Explains the different parts and features of the Roughness Testers, along with technical specifications

    [8 pages, English ]

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